Re: [PATCH 2/2] x86, mem-hotplug: update all PGDs for directmapping and vmemmap mapping changes on 64bit.

[Wu Fengguang]

> @@ -1033,6 +1038,7 @@ vmemmap_populate(struct page *start_page, unsigned long size, int node)
>   		}
> 
>   	}
> +	sync_global_pgds((unsigned long)start_page, end);

Here you removed the tlb flush in the original patch. Is it safe to do so?

Thanks,
Fengguang
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